<<<<<<< HEAD:first homework/f22011219-郭欣/Quack.java
package com.example.Lib;
=======
package com.example.f22011226;
>>>>>>> 9847e549d509add37aeccd03e626d0f7a5d9ad62:first homework/f22011226_卢鸣宇/Quack.java

public class Quack implements Quackbehavior{

    @Override
    public void quack() {
        System.out.println("gua gua");
    }
}
